Transformation Toughening in Sol-Gel-Derived Alumina-Zirconia Composites

The microstructures of α‐Al2O3 seeded sol–gel‐derived alumina‐zirconia composites containing 20 wt% unstabilized zirconia (processed from zirconium n‐propoxide) were very fine, with submicrometer alumina grains and small, mainly intergranular zirconia particles, the latter having a critical size for...

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Published in:Journal of the American Ceramic Society 1997-08, Vol.80 (8), p.2056-2060
Main Authors: Srdi, Vladimir V., Radonji, Ljiljana
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Structural ceramics
Technical ceramics
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description The microstructures of α‐Al2O3 seeded sol–gel‐derived alumina‐zirconia composites containing 20 wt% unstabilized zirconia (processed from zirconium n‐propoxide) were very fine, with submicrometer alumina grains and small, mainly intergranular zirconia particles, the latter having a critical size for the tetragonal‐to‐monoclinic phase transformation of 0.45 μm. The corresponding ratios of the toughening contribution to the matrix toughness are relatively low (δKc/K0
doi_str_mv 10.1111/j.1151-2916.1997.tb03089.x
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subjects Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Structural ceramics
Technical ceramics
title Transformation Toughening in Sol-Gel-Derived Alumina-Zirconia Composites
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